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Marlin
Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
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UnifiedFirmware
Unified Firmware 2.0 is the latest easy to use firmware for select 3D printers and boards from TH3D Studio. Both 8 bit and 32 bit based machines/boards are supported thanks to being built on Marlin 2.0.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I need someone to send me a fully working GD32F1xx board so I can add support for it to Marlin. I cannot afford creating or searching for it. But I promise to create an implementation that will make you very happy. https://github.com/MarlinFirmware/Marlin/discussions/24985
What do you mean "TH3D" fork? I found this but there is no specific GD32 folder inside the HAL.